Carbureter.



A. G. LAMB.

CARBURBTER.

APPLICATION FILED run, 1a. 1909.

1,106,226, Patented Aug. 4, 1914 ZSHEETS-SHEET 1. CLQxj attamnu S A. G.LAMB.

CARBURETER.

APPLICATION FILED FEB,13,1909.

Patented Aug. 4, 19ML 2 SHEETSVSHEBT 2.

provide acarbureter wherein a small amount SATES PATENT OFFICE.

AMHERST G. LAMB, 0F TORRINGTON, CONNECTICUT, ASSIGNOR TO EXCELSIORNEEDLE COMPANY. OF TORRINGTON, CONNECTICUT, .A CORPORATION 0FCONNECTICUT.

CARBURETER.

Specification. of Letters Patent.

Application led February 13, 1909. Serial No. 477,800.

To all whom it may concern Be it known that l, Aaiiinns'r (l. Lann, acitizen of thcllnited States, rcsidingat Torrington, in the county ofLitchfield, State of Connecticut, have invented certain new and Usefulimprovements in Carbureters for Explosive-Engines, of which thefollowing is a description, reference being had to the accompanyingdrawing and to the letters and figures ot' reference marked thereon.

My invention relates to new and useful improvements in carbureters t'orexplosive engines, and has for its object to produce a carbureter whichshall be simple in construction and durable and efficient in operation.

A further object of the invention is to of air may be supplied directlyaround the upper end of the nozzle, and wherein a further quantity otair may be automatically controlled and supplied when the suction strokeof the engine becomes excessive.

A further object of the invention is to provide a 'carbureter whereinthe needle valve cont-rolling the tlow through the nozzle is so coupledwith the throttle, that when the throttle is operated to open or closethe saine, the needle valve is opened or closed a greater distance, thusincreasing or decreasing the supply of oil. or gasolene.

A further object of the invention is to provide a carbureter having anozzle, with mechanically controlled air inlet ports for supplying airdirectly around the nozzle, and automatically controlled air inlet portsfor supplying air at a point above the nozzle.

These and other4 objects will in part be obvious, and will in part behereinafter' more fully described.

In the drawings, Figure 1 is a vertical section through the parts of thecarbureter; Fig. 2 is a sectional view on the line 5-5 of Fig. 1, with aportion of the valve broken away; Fig. is a detail sectional view of theweighted valve; Fig. t is a view partly in vertical section of analternative forni of my carbureter; Fig. 5 is a top plan view of thecontrolling stop for the throttle valve; Fig. (3 is a detail in sideelevation, showing the controlling lever for the throttle and the stoptherefor, with the needle valve controlling member omitted; Fig. 7 is adetail of the central partition and support for thc needle valve, shownin Fig. 7.

The fuel or explosive liquid, is supplied to the carburetor through asupply pipe 1. which extends into the lower end ol a lioat valve chamber2. A needle valve 3 extends 60 down through the chamber 2, and engages asuitable valve scat in the supply pipe 1. Said chamber 2 is providedwith a lloat 4. which engages weighted levers 5, pivoted to suitablelugs. 6, 6, carried by the cap ot' G5 the chamber 2. Said levers 5. attheir inner ends engage between suitable collars on, the needle valve 3.This construction of float-operated valve is of the usual 'orm, andfurther description will not be `necessary. m l

The carbureter 7 proper, is suitably secured, asherein shown, to thechamber 2, and supports at its upper end a chamber 8, in which ismounted the throttle valve. The Y7S carburetcr 7 consists of anv outereasing 9, which is constructed with a cylindrical base 10, into whichextends a nozzle 11. The

,casing l) is also provided with a ledge 12,

which serves as a seat for the valve 13.

Suitable openings 14 are formed in the ledge 12, which lead from theinner portion of the casing to the outer air. The base portion 10extends up into the casing, fern. ing a cylindrical partition 15,whichis lo- 85 cated between the nozzle and the outer casing 9. Thepartition 15 is provided with a plurality of openings 16, which, asherein shown, are inclined upward, as they lead` to the inner side ofthe partition. The partition 15 is parallel with the outer casing, andforms a guideway for the weighted valve 13. The weighted valve, 13 isrecessed on its lower face, and in said recess is inserted a suitablepacking 17. Said packing 17 95 normally rests on the ledge 12 and closesthe openings 14. A conical shell or thimble 18 is located-o inside ofthe cylindrical partition 15, and engages the inner face thereof at apoint slightly below the opening 16. Said thimble. as herein shown, isin the shape of the frustrum of a cone, with its open uaper end directlyabove the nozzle 11, and slig itly larger than the same.

The base portion 10 is rovided at its lower end withsuitable air inlets19. Said air inlets 19 are controlled by a hand valve ioo 20, whichsurrounds a stem 21 extending `from the lower portion of the base 10,and is held seated against said base by means of a spring 22, and a nut`23.

ln Fig. 1 l have shown a needle valve 24, extending up through the nut23 and the base portion 10, into the nozzle 11. SaidV needle valve 24 isof the usual construction, and coperates with the tapered outlet of thenozzle.

The throttle chamber 8 communicates with the 'central opening 25, at theupper ortion of `the outer casing ofV the carureter. .A throttle valve26, as4 herein shown.I is cylindrical in shape and lits the inner faceof the chamber 8. Said throttle valve at its upper end is closed, andcarries' an upwardly extending stem 27, which extends through the casing8, and a suitable operating lever y28 is rigidly secured to the stem 27by a set screw 29. A stop 30 is secured to the upper part of the chamber8, andserves as a means'for limiting the movementof the lever 8. Thethrottle valve 26 is provided with the usual opening 31, which may bebrought into register with the opening 32, leading from the carbureter..Byosu cillating thethrottle valve 26, the opening 32 may be closed moreor less, as desired, thus controlling the supply of the mixed vapors tothe engine.

A suitable passage 33 leads from the float chamber 2 to the nozzle 11.'llhe needle valve 24, is bent at right angles'to form a handle 34,whereby said needle valve may be operated.

In the construction shown in Figs. 1 to 7 A inclusive, the float chamberis connected to the carbureter proper 7 as above described,

and said carbureter has a base portion 10 with air inlets 19, which arecontrolled by a manually operated-valve 20, held'seated against thelower part of the base portion by a spring 22 and a nut 23. Instead orextending the base vportion up into the carbureting chamber, as shown inFig. 4, I have in this form of my` carbureter, provided a cylindricalpartition 35, whiph engages a seat 36, formed in the base portion 10.Said partition 35 is provided with openings 37, which are controlled bythe weighted valve 13, which also controls the openings 14- in thesupporting ledge of the casing.

The .cylindrical vpartition 35 isq provided with inwardly extending arms38', 38 which cariyja supporting sleeve 39, in which is mounted a needlevalve 40. The nozzle 11 is provided with an inverted conical seat,

vwith,whiclifthe needle valve 40 coperates.

The casing 9 of the carbureter, as shown Lin Fig. 7, extends upwardlyand forms a housing for the throttle valve S36, Said throttle valve iscylindrical, and has. the usual cut on` opening 41, which copcrates-`incense which seats against the inner face of the head of the throttlevalve, and by means of the screw 46, said rod 44 is -firmly clamped 'tothe throttle valve, so' that the same is oscillated with the throttlevalve.

At its lower end the rod 44 has a flattened projection 47, which engagesbetween suitable ears 48, formed at the upper end of 4the needle valve40. The attened projection 47 extends only part Way into the spacebetween the ears 48. As they throttle valve is oscillated one way or theother, the rod 44 will be similarly oscillated, and, through itsconnection with the needle valve, will operate said needle valve. Theconnection between the rod 44 and the needle valve, allows the needlevalve which is threaded into the collar 39, to move up and down.

When it is desired to adjust the needle valve independently of thethrottle valve, the nut 46 is loosened, and the rod 44 may be turnedindependently of .the throttle valve, by any suitable implement whichmay engage with the slotted end 49 of said rod 44. The throttle valve isoscillated through the arm 50, which is rigidly secured thereto, and acollar 51 carrying a stop lug 52, cooperating with a stop pin 53, maylimit the movement of said arm 50.

In the operation of my device, the fluid for operating the engine issupplied through the float valve to the nozzle, and in starting theengine the auxiliary air ports at the base of the carbureter are closedby manipulating the valve 20. The suction stroke of the engine will drawfrom the nozzle suitable supply of fluid, which lis mixed with air admitted to the carburet'ing chamber through the opening 6, by reason of[the weighted` valve being lifted by the suction stroke of the engine.After the engine is speeued up, the auxiliary air ports 19 are opened,so that a certain definite quantity of air is supplied around the nozzle11 of .the carbureter, and-the inrushing air passing across the mouth ofthe nozzle will draw in a certain amount of the duid, which will bethoroughly mixed with the air, and the mixed vapor is supplied to theengine, the amount of the mixture being supplied beingV controlled bythethrottle valve. When the suction stroke ofl the engine isv excessive,the weighted valve will be lifted further, and a greater amount ofairwill be supplied through the openings 16.

lin the form of carbureter shown' in Fig. 7 the opening and the closingof the throttle valve to admit more or less mixture -to-the explosivechamber, also controls the position of the needle valve and the amountof fluid supplied to the oarbnreting chamber.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is

1. A carbureter including in combination, an outer casing having adepending base portion and a ledge extending entirely about said casingand forming a valvev seat with openings therethrough leading to theoutside of said casing, a nozzle extending into said base portion, avertical partition forming a continuation of the base portion andextending upwardly into said casing, a thimble carried by saldpartition, said partition having openings therethrough above saidthimble, and a valve for automatically controlling the air supplythrough the openings in said ledge.

2. A carbureter including in combination, an outer casing having adepending base portion and a ledge forming a valve seat with openingstherethrough leading to the outside of said casing, a nozzle extending`linto said base portion. a vertical partitlon forming a continuation ofthe base portion and extending upwardly into said casing, a thimblecarried by said partition, said partition having openings therethroughabove said thimble,' a valve for automatically controlling 'the airsupply through the openings in said ledge, other air inlets formed insaid base portion, and a manually operated valve for controlling saidlast named air inlets.

3. A carbureter including in combination,-

an outer casing having a depending base portion and a ledge extendingentirely about said casing and forming a valve seat with openingstherethrough leading to the outside of said casing, a nozzle extendinginto said base portion, a vertical partition forming a continuation ofthe base portion and extending upwardly 'into said casing, a thimblecarried by said partition, said partition having openings` therethroughabove said thimble, and a valve for automatically controlling the airsupply through the openings in said ledge, said valve being provided inits lower face with a recess adapted to receive a packing.

4. A carbureter including in combination, an outer casing, a nozzleextending into said outer casing, normally stationary supporting arms, asleeve carried by said supporting arms, a needle valve threaded intosaid sleeve and coperating with said nozzle, a throttle valve, and meanslocated within said casing for connecting the throttle valve with saidneedle valve.

5. A carbureter including in combination an outer casing, a nozzleextending into said outer casing, a needle valve located within saidcasing, means for su )porting said ncedle valve including a threadedsleeve, a throttle valve, a r0d,means whereby said rod is secured to thethrottle valve so as to turn therewith, said rod having a reducedportion and said needle valve having spaced ears between which saidreduced portion extends whereby the movement of Said rod will beimparted to said needle valve. G. A- carbureter including incombination, an outer casing, a nozzle extending into said outer casing,a vertical partition carried by said casing and spaced therefrom, saidcasing having openings therethrough between the outer portions of thecasing and the vertical partition, a valve for controlling saidopenings, arms carried by said partition, a threaded sleeve carried bysaid arms, a necdle valve located in said threaded sleeve, andcoperating with said nozzle, a throttle valve, and means located withinsaid `casing for connecting the throttle valve with said needle valvefIn testimony whereof I ailix my signature, in presence of two witnesses.

AMHERST G. LAMB.

Copies of this patent may be obtained for ive cents each, 'by addressingthe Commissioner of Iatents, Washington, D. C.

